Malware Analysis Report

2025-08-06 04:33

Sample ID 240126-axnfesbehj
Target baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.exe
SHA256 c73cb93ad9ad6d003b505ce2b960d75467ad612786e0559c74dca18426fb9400
Tags
djvu discovery persistence ransomware
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

c73cb93ad9ad6d003b505ce2b960d75467ad612786e0559c74dca18426fb9400

Threat Level: Known bad

The file baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.exe was found to be: Known bad.

Malicious Activity Summary

djvu discovery persistence ransomware

Djvu family

Detected Djvu ransomware

Djvu Ransomware

Checks computer location settings

Modifies file permissions

Looks up external IP address via web service

Adds Run key to start application

Unsigned PE

Enumerates physical storage devices

Suspicious behavior: EnumeratesProcesses

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-01-26 00:35

Signatures

Detected Djvu ransomware

Description Indicator Process Target
N/A N/A N/A N/A

Djvu family

djvu

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-01-26 00:35

Reported

2024-01-26 00:38

Platform

win7-20231215-en

Max time kernel

142s

Max time network

146s

Command Line

"C:\Users\Admin\AppData\Local\Temp\baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.exe"

Signatures

Detected Djvu ransomware

Description Indicator Process Target
N/A N/A N/A N/A

Djvu Ransomware

ransomware djvu

Modifies file permissions

discovery
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\icacls.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-3427588347-1492276948-3422228430-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\e91b4fd8-90ab-4a03-8c18-bf9ed6092053\\baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.exe\" --AutoStart" C:\Users\Admin\AppData\Local\Temp\baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.exe N/A

Looks up external IP address via web service

Description Indicator Process Target
N/A api.2ip.ua N/A N/A
N/A api.2ip.ua N/A N/A
N/A api.2ip.ua N/A N/A

Enumerates physical storage devices

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2436 wrote to memory of 2688 N/A C:\Users\Admin\AppData\Local\Temp\baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.exe C:\Windows\SysWOW64\icacls.exe
PID 2436 wrote to memory of 2688 N/A C:\Users\Admin\AppData\Local\Temp\baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.exe C:\Windows\SysWOW64\icacls.exe
PID 2436 wrote to memory of 2688 N/A C:\Users\Admin\AppData\Local\Temp\baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.exe C:\Windows\SysWOW64\icacls.exe
PID 2436 wrote to memory of 2688 N/A C:\Users\Admin\AppData\Local\Temp\baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.exe C:\Windows\SysWOW64\icacls.exe
PID 2436 wrote to memory of 2612 N/A C:\Users\Admin\AppData\Local\Temp\baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.exe C:\Users\Admin\AppData\Local\Temp\baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.exe
PID 2436 wrote to memory of 2612 N/A C:\Users\Admin\AppData\Local\Temp\baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.exe C:\Users\Admin\AppData\Local\Temp\baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.exe
PID 2436 wrote to memory of 2612 N/A C:\Users\Admin\AppData\Local\Temp\baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.exe C:\Users\Admin\AppData\Local\Temp\baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.exe
PID 2436 wrote to memory of 2612 N/A C:\Users\Admin\AppData\Local\Temp\baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.exe C:\Users\Admin\AppData\Local\Temp\baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.exe

Processes

C:\Users\Admin\AppData\Local\Temp\baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.exe

"C:\Users\Admin\AppData\Local\Temp\baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.exe"

C:\Windows\SysWOW64\icacls.exe

icacls "C:\Users\Admin\AppData\Local\e91b4fd8-90ab-4a03-8c18-bf9ed6092053" /deny *S-1-1-0:(OI)(CI)(DE,DC)

C:\Users\Admin\AppData\Local\Temp\baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.exe

"C:\Users\Admin\AppData\Local\Temp\baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.exe" --Admin IsNotAutoStart IsNotTask

Network

Country Destination Domain Proto
US 8.8.8.8:53 api.2ip.ua udp
US 172.67.139.220:443 api.2ip.ua tcp
US 172.67.139.220:443 api.2ip.ua tcp
US 8.8.8.8:53 colisumy.com udp
US 8.8.8.8:53 zexeq.com udp
US 199.59.242.150:80 zexeq.com tcp

Files

C:\Users\Admin\AppData\Local\e91b4fd8-90ab-4a03-8c18-bf9ed6092053\baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.exe

MD5 5cacd6f1b5cec25f3f0b0b3c4d5807d3
SHA1 41b8851bc57462502b0113ee1f2579dff5d94f4f
SHA256 c73cb93ad9ad6d003b505ce2b960d75467ad612786e0559c74dca18426fb9400
SHA512 7d46037825e5f34f02105c45ee05e03e4c2d7e73889a43c4e47704e27e563cae63f5d0dffb01a2d628ad0b3962e31cebf44dbed5892b6e1a995c45ee2c0714b4

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

MD5 8202a1cd02e7d69597995cabbe881a12
SHA1 8858d9d934b7aa9330ee73de6c476acf19929ff6
SHA256 58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5
SHA512 97ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

MD5 9092075ae624bc27db0e5c3ae2400451
SHA1 b013b30c0c58362273f070e340121b8aa743d438
SHA256 8079111a395ce837aa7ca8847e3136c9d69b382dedd5bb8b15c42feec9ad6c80
SHA512 a3526f04d69879686f1f1e51e6eebd0d0c691c89f007d111247d564f75a175bd491ba090965fa11ceda65f3cfac4d4efc8f5931f5fc658ffdcb42a636c4bfd03

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

MD5 8daed5fecd6b7116eb16ea66eda552e0
SHA1 bb2149a2541f11dc4da8df7f4579dd65c341ce8b
SHA256 076f87f4acbece273de34b83b72bb1a4cf38135f1cf27c49722ce8dfe5c60d71
SHA512 eeb7e9bea6db27a316e09dd4cdaae0ccbb3d895e56dad92f54e59a6bb13e450fb6bfb09972f7a23aadba82960af004a7b72852d477b14b80d9d5a68dd6859fc7

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

MD5 c5b8fff9183e0c3f560a43a0ec147841
SHA1 8cf7a72f8e7242823a932e29749f4b011193f092
SHA256 05fb64a509c823988adb43ef3248b46a7b5a8a59e3efc339aeffab444bec2b63
SHA512 397065559c23e61227362168e4ceafbe1d1ca0e12f13bb77a4b9dccf208735669a30e2ec17d97c7796da49adc69f3e03d5bbb5c3a6a508487e4421219e666100

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

MD5 57d77b8cc0c8c921813007bcf36f4962
SHA1 3da90ee146114e0259244e62e9d241ad4dcc8e2c
SHA256 45ac0cafa869f8c36ce3ee96f4c5611f082e13517b81ee040bd88fd813243f00
SHA512 a1b7adbf73ce59c8f0cc60bd2672f916d604a9a2021b678451f9a6931653c2c44cbd138155a77c63bb19bcd9b467186c30f9dfe1ecdd43f472d42440c6d3b89c

C:\Users\Admin\AppData\Local\Temp\Cab92ED.tmp

MD5 ac05d27423a85adc1622c714f2cb6184
SHA1 b0fe2b1abddb97837ea0195be70ab2ff14d43198
SHA256 c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d
SHA512 6d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d

Analysis: behavioral2

Detonation Overview

Submitted

2024-01-26 00:35

Reported

2024-01-26 00:38

Platform

win10v2004-20231215-en

Max time kernel

143s

Max time network

153s

Command Line

"C:\Users\Admin\AppData\Local\Temp\baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.exe"

Signatures

Detected Djvu ransomware

Description Indicator Process Target
N/A N/A N/A N/A

Djvu Ransomware

ransomware djvu

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-3336304223-2978740688-3645194410-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.exe N/A
Key value queried \REGISTRY\USER\S-1-5-21-3336304223-2978740688-3645194410-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.exe N/A

Modifies file permissions

discovery
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\icacls.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-3336304223-2978740688-3645194410-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\24ae5b7d-ba21-43b4-8dff-a80b1b4fc05b\\baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.exe\" --AutoStart" C:\Users\Admin\AppData\Local\Temp\baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.exe N/A

Looks up external IP address via web service

Description Indicator Process Target
N/A api.2ip.ua N/A N/A
N/A api.2ip.ua N/A N/A
N/A api.2ip.ua N/A N/A

Enumerates physical storage devices

Processes

C:\Users\Admin\AppData\Local\Temp\baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.exe

"C:\Users\Admin\AppData\Local\Temp\baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.exe"

C:\Windows\SysWOW64\icacls.exe

icacls "C:\Users\Admin\AppData\Local\24ae5b7d-ba21-43b4-8dff-a80b1b4fc05b" /deny *S-1-1-0:(OI)(CI)(DE,DC)

C:\Users\Admin\AppData\Local\Temp\baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.exe

"C:\Users\Admin\AppData\Local\Temp\baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.exe" --Admin IsNotAutoStart IsNotTask

Network

Country Destination Domain Proto
US 138.91.171.81:80 tcp
US 8.8.8.8:53 api.2ip.ua udp
US 104.21.65.24:443 api.2ip.ua tcp
US 8.8.8.8:53 194.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 24.65.21.104.in-addr.arpa udp
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 99.201.58.216.in-addr.arpa udp
US 8.8.8.8:53 73.31.126.40.in-addr.arpa udp
US 104.21.65.24:443 api.2ip.ua tcp
US 8.8.8.8:53 colisumy.com udp
US 8.8.8.8:53 zexeq.com udp
US 199.59.242.150:80 zexeq.com tcp
US 199.59.242.150:80 zexeq.com tcp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 150.242.59.199.in-addr.arpa udp
US 8.8.8.8:53 81.171.91.138.in-addr.arpa udp
US 8.8.8.8:53 26.165.165.52.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 140.71.91.104.in-addr.arpa udp
US 8.8.8.8:53 173.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 48.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 200.201.50.20.in-addr.arpa udp

Files

C:\Users\Admin\AppData\Local\24ae5b7d-ba21-43b4-8dff-a80b1b4fc05b\baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.exe

MD5 5cacd6f1b5cec25f3f0b0b3c4d5807d3
SHA1 41b8851bc57462502b0113ee1f2579dff5d94f4f
SHA256 c73cb93ad9ad6d003b505ce2b960d75467ad612786e0559c74dca18426fb9400
SHA512 7d46037825e5f34f02105c45ee05e03e4c2d7e73889a43c4e47704e27e563cae63f5d0dffb01a2d628ad0b3962e31cebf44dbed5892b6e1a995c45ee2c0714b4

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

MD5 8202a1cd02e7d69597995cabbe881a12
SHA1 8858d9d934b7aa9330ee73de6c476acf19929ff6
SHA256 58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5
SHA512 97ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

MD5 ddd9e87b68af2f76a84295a77341a423
SHA1 fdcc86aa063ebb376505b3a5ff69bd47c3685de2
SHA256 9ba20cbfb1097966b239dcc5a539fa7fe0254ca02c3fb29302ca3ecba8bcbd19
SHA512 bae9f225eb2a0d4a7c1bd42520518975a3632499501d1bdf94f76e5aa94b5fc1850f7fdadb332b6d6b0d2cb62404ac24f1afbb8a83319cdd40cb966a9ce85699

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

MD5 8daed5fecd6b7116eb16ea66eda552e0
SHA1 bb2149a2541f11dc4da8df7f4579dd65c341ce8b
SHA256 076f87f4acbece273de34b83b72bb1a4cf38135f1cf27c49722ce8dfe5c60d71
SHA512 eeb7e9bea6db27a316e09dd4cdaae0ccbb3d895e56dad92f54e59a6bb13e450fb6bfb09972f7a23aadba82960af004a7b72852d477b14b80d9d5a68dd6859fc7

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

MD5 cbdd878e6795bb24ecc35bb4306f966f
SHA1 80fdc3e3de09874e75920bdb0e7c0f8bbacbf27a
SHA256 16251b27b3cf83e500304e0b51d7a353476e97091835f1c940b19fca43002f26
SHA512 343cbab2389b59e302d1f4f119c2dda1053f89325584f08c7218dfce95ef0cb7fb1a53d23e173e47deb50c93031d93a70dc6d2366e8fc1dc3fe970cf4f4f4bf0

C:\Users\Admin\AppData\Local\6ad8e551-a59b-493a-9787-a85ec8081045\build3.exe

MD5 e100eec7772bd5d2fd825556d6646358
SHA1 fa4394a522c402d37c6fe411b7fb710d7922f838
SHA256 57b3b52d59d18fa282b3835a9ac6206308007f7dfac472dbe26b78c8e52244e5
SHA512 63b5c0d6fc54fac45be27b690bd33ae3c5e3b7d31c2fac1df6f2ebd3f4a4303f76f4c01a19c0ddba0bd55e7745b01c0a913d49542257a6515705a0d2fe49cfee